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<pre><span class="sourceLineNo">001</span>/* ===========================================================<a name="line.1"></a>
<span class="sourceLineNo">002</span> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a>
<span class="sourceLineNo">003</span> * ===========================================================<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.<a name="line.5"></a>
<span class="sourceLineNo">006</span> *<a name="line.6"></a>
<span class="sourceLineNo">007</span> * Project Info:  http://www.jfree.org/jfreechart/index.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * This library is free software; you can redistribute it and/or modify it<a name="line.9"></a>
<span class="sourceLineNo">010</span> * under the terms of the GNU Lesser General Public License as published by<a name="line.10"></a>
<span class="sourceLineNo">011</span> * the Free Software Foundation; either version 2.1 of the License, or<a name="line.11"></a>
<span class="sourceLineNo">012</span> * (at your option) any later version.<a name="line.12"></a>
<span class="sourceLineNo">013</span> *<a name="line.13"></a>
<span class="sourceLineNo">014</span> * This library is distributed in the hope that it will be useful, but<a name="line.14"></a>
<span class="sourceLineNo">015</span> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY<a name="line.15"></a>
<span class="sourceLineNo">016</span> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public<a name="line.16"></a>
<span class="sourceLineNo">017</span> * License for more details.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a>
<span class="sourceLineNo">020</span> * License along with this library; if not, write to the Free Software<a name="line.20"></a>
<span class="sourceLineNo">021</span> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,<a name="line.21"></a>
<span class="sourceLineNo">022</span> * USA.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. <a name="line.24"></a>
<span class="sourceLineNo">025</span> * Other names may be trademarks of their respective owners.]<a name="line.25"></a>
<span class="sourceLineNo">026</span> *<a name="line.26"></a>
<span class="sourceLineNo">027</span> * -------------------<a name="line.27"></a>
<span class="sourceLineNo">028</span> * JDBCPieDataset.java<a name="line.28"></a>
<span class="sourceLineNo">029</span> * -------------------<a name="line.29"></a>
<span class="sourceLineNo">030</span> * (C) Copyright 2002-2009, by Bryan Scott and Contributors.<a name="line.30"></a>
<span class="sourceLineNo">031</span> *<a name="line.31"></a>
<span class="sourceLineNo">032</span> * Original Author:  Bryan Scott; Andy<a name="line.32"></a>
<span class="sourceLineNo">033</span> * Contributor(s):   David Gilbert (for Object Refinery Limited);<a name="line.33"></a>
<span class="sourceLineNo">034</span> *                   Thomas Morgner;<a name="line.34"></a>
<span class="sourceLineNo">035</span> *<a name="line.35"></a>
<span class="sourceLineNo">036</span> * Changes<a name="line.36"></a>
<span class="sourceLineNo">037</span> * -------<a name="line.37"></a>
<span class="sourceLineNo">038</span> * 26-Apr-2002 : Creation based on JdbcXYDataSet, but extending<a name="line.38"></a>
<span class="sourceLineNo">039</span> *               DefaultPieDataset (BS);<a name="line.39"></a>
<span class="sourceLineNo">040</span> * 24-Jun-2002 : Removed unnecessary import and local variable (DG);<a name="line.40"></a>
<span class="sourceLineNo">041</span> * 13-Aug-2002 : Updated Javadoc comments and imports, removed default<a name="line.41"></a>
<span class="sourceLineNo">042</span> *               constructor (DG);<a name="line.42"></a>
<span class="sourceLineNo">043</span> * 18-Sep-2002 : Updated to support BIGINT (BS);<a name="line.43"></a>
<span class="sourceLineNo">044</span> * 21-Jan-2003 : Renamed JdbcPieDataset --&gt; JDBCPieDataset (DG);<a name="line.44"></a>
<span class="sourceLineNo">045</span> * 03-Feb-2003 : Added Types.DECIMAL (see bug report 677814) (DG);<a name="line.45"></a>
<span class="sourceLineNo">046</span> * 05-Jun-2003 : Updated to support TIME, optimised executeQuery method (BS);<a name="line.46"></a>
<span class="sourceLineNo">047</span> * 30-Jul-2003 : Added empty contructor and executeQuery(connection,string)<a name="line.47"></a>
<span class="sourceLineNo">048</span> *               method (BS);<a name="line.48"></a>
<span class="sourceLineNo">049</span> * 02-Dec-2003 : Throwing exceptions allows to handle errors, removed default<a name="line.49"></a>
<span class="sourceLineNo">050</span> *               constructor, as without a connection, a query can never be<a name="line.50"></a>
<span class="sourceLineNo">051</span> *               executed (TM);<a name="line.51"></a>
<span class="sourceLineNo">052</span> * 04-Dec-2003 : Added missing Javadocs (DG);<a name="line.52"></a>
<span class="sourceLineNo">053</span> * ------------- JFREECHART 1.0.x ---------------------------------------------<a name="line.53"></a>
<span class="sourceLineNo">054</span> * 02-Feb-2007 : Removed author tags all over JFreeChart sources (DG);<a name="line.54"></a>
<span class="sourceLineNo">055</span> * 19-May-2009 : Fixed FindBugs warnings, patch by Michal Wozniak (DG);<a name="line.55"></a>
<span class="sourceLineNo">056</span> *<a name="line.56"></a>
<span class="sourceLineNo">057</span> */<a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span>package org.jfree.data.jdbc;<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span>import java.sql.Connection;<a name="line.61"></a>
<span class="sourceLineNo">062</span>import java.sql.DriverManager;<a name="line.62"></a>
<span class="sourceLineNo">063</span>import java.sql.ResultSet;<a name="line.63"></a>
<span class="sourceLineNo">064</span>import java.sql.ResultSetMetaData;<a name="line.64"></a>
<span class="sourceLineNo">065</span>import java.sql.SQLException;<a name="line.65"></a>
<span class="sourceLineNo">066</span>import java.sql.Statement;<a name="line.66"></a>
<span class="sourceLineNo">067</span>import java.sql.Timestamp;<a name="line.67"></a>
<span class="sourceLineNo">068</span>import java.sql.Types;<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span>import org.jfree.data.general.DefaultPieDataset;<a name="line.70"></a>
<span class="sourceLineNo">071</span>import org.jfree.data.general.PieDataset;<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span>/**<a name="line.73"></a>
<span class="sourceLineNo">074</span> * A {@link PieDataset} that reads data from a database via JDBC.<a name="line.74"></a>
<span class="sourceLineNo">075</span> * &lt;P&gt;<a name="line.75"></a>
<span class="sourceLineNo">076</span> * A query should be supplied that returns data in two columns, the first<a name="line.76"></a>
<span class="sourceLineNo">077</span> * containing VARCHAR data, and the second containing numerical data.  The<a name="line.77"></a>
<span class="sourceLineNo">078</span> * data is cached in-memory and can be refreshed at any time.<a name="line.78"></a>
<span class="sourceLineNo">079</span> */<a name="line.79"></a>
<span class="sourceLineNo">080</span>public class JDBCPieDataset extends DefaultPieDataset {<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>    /** For serialization. */<a name="line.82"></a>
<span class="sourceLineNo">083</span>    static final long serialVersionUID = -8753216855496746108L;<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>    /** The database connection. */<a name="line.85"></a>
<span class="sourceLineNo">086</span>    private transient Connection connection;<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span>    /**<a name="line.88"></a>
<span class="sourceLineNo">089</span>     * Creates a new JDBCPieDataset and establishes a new database connection.<a name="line.89"></a>
<span class="sourceLineNo">090</span>     *<a name="line.90"></a>
<span class="sourceLineNo">091</span>     * @param url  the URL of the database connection.<a name="line.91"></a>
<span class="sourceLineNo">092</span>     * @param driverName  the database driver class name.<a name="line.92"></a>
<span class="sourceLineNo">093</span>     * @param user  the database user.<a name="line.93"></a>
<span class="sourceLineNo">094</span>     * @param password  the database users password.<a name="line.94"></a>
<span class="sourceLineNo">095</span>     *<a name="line.95"></a>
<span class="sourceLineNo">096</span>     * @throws ClassNotFoundException if the driver cannot be found.<a name="line.96"></a>
<span class="sourceLineNo">097</span>     * @throws SQLException if there is a problem obtaining a database<a name="line.97"></a>
<span class="sourceLineNo">098</span>     *                      connection.<a name="line.98"></a>
<span class="sourceLineNo">099</span>     */<a name="line.99"></a>
<span class="sourceLineNo">100</span>    public JDBCPieDataset(String url,<a name="line.100"></a>
<span class="sourceLineNo">101</span>                          String driverName,<a name="line.101"></a>
<span class="sourceLineNo">102</span>                          String user,<a name="line.102"></a>
<span class="sourceLineNo">103</span>                          String password)<a name="line.103"></a>
<span class="sourceLineNo">104</span>        throws SQLException, ClassNotFoundException {<a name="line.104"></a>
<span class="sourceLineNo">105</span><a name="line.105"></a>
<span class="sourceLineNo">106</span>        Class.forName(driverName);<a name="line.106"></a>
<span class="sourceLineNo">107</span>        this.connection = DriverManager.getConnection(url, user, password);<a name="line.107"></a>
<span class="sourceLineNo">108</span>    }<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span>    /**<a name="line.110"></a>
<span class="sourceLineNo">111</span>     * Creates a new JDBCPieDataset using a pre-existing database connection.<a name="line.111"></a>
<span class="sourceLineNo">112</span>     * &lt;P&gt;<a name="line.112"></a>
<span class="sourceLineNo">113</span>     * The dataset is initially empty, since no query has been supplied yet.<a name="line.113"></a>
<span class="sourceLineNo">114</span>     *<a name="line.114"></a>
<span class="sourceLineNo">115</span>     * @param con  the database connection.<a name="line.115"></a>
<span class="sourceLineNo">116</span>     */<a name="line.116"></a>
<span class="sourceLineNo">117</span>    public JDBCPieDataset(Connection con) {<a name="line.117"></a>
<span class="sourceLineNo">118</span>        if (con == null) {<a name="line.118"></a>
<span class="sourceLineNo">119</span>            throw new NullPointerException("A connection must be supplied.");<a name="line.119"></a>
<span class="sourceLineNo">120</span>        }<a name="line.120"></a>
<span class="sourceLineNo">121</span>        this.connection = con;<a name="line.121"></a>
<span class="sourceLineNo">122</span>    }<a name="line.122"></a>
<span class="sourceLineNo">123</span><a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span>    /**<a name="line.125"></a>
<span class="sourceLineNo">126</span>     * Creates a new JDBCPieDataset using a pre-existing database connection.<a name="line.126"></a>
<span class="sourceLineNo">127</span>     * &lt;P&gt;<a name="line.127"></a>
<span class="sourceLineNo">128</span>     * The dataset is initialised with the supplied query.<a name="line.128"></a>
<span class="sourceLineNo">129</span>     *<a name="line.129"></a>
<span class="sourceLineNo">130</span>     * @param con  the database connection.<a name="line.130"></a>
<span class="sourceLineNo">131</span>     * @param query  the database connection.<a name="line.131"></a>
<span class="sourceLineNo">132</span>     *<a name="line.132"></a>
<span class="sourceLineNo">133</span>     * @throws SQLException if there is a problem executing the query.<a name="line.133"></a>
<span class="sourceLineNo">134</span>     */<a name="line.134"></a>
<span class="sourceLineNo">135</span>    public JDBCPieDataset(Connection con, String query) throws SQLException {<a name="line.135"></a>
<span class="sourceLineNo">136</span>        this(con);<a name="line.136"></a>
<span class="sourceLineNo">137</span>        executeQuery(query);<a name="line.137"></a>
<span class="sourceLineNo">138</span>    }<a name="line.138"></a>
<span class="sourceLineNo">139</span><a name="line.139"></a>
<span class="sourceLineNo">140</span>    /**<a name="line.140"></a>
<span class="sourceLineNo">141</span>     *  ExecuteQuery will attempt execute the query passed to it against the<a name="line.141"></a>
<span class="sourceLineNo">142</span>     *  existing database connection.  If no connection exists then no action<a name="line.142"></a>
<span class="sourceLineNo">143</span>     *  is taken.<a name="line.143"></a>
<span class="sourceLineNo">144</span>     *  The results from the query are extracted and cached locally, thus<a name="line.144"></a>
<span class="sourceLineNo">145</span>     *  applying an upper limit on how many rows can be retrieved successfully.<a name="line.145"></a>
<span class="sourceLineNo">146</span>     *<a name="line.146"></a>
<span class="sourceLineNo">147</span>     * @param  query  the query to be executed.<a name="line.147"></a>
<span class="sourceLineNo">148</span>     *<a name="line.148"></a>
<span class="sourceLineNo">149</span>     * @throws SQLException if there is a problem executing the query.<a name="line.149"></a>
<span class="sourceLineNo">150</span>     */<a name="line.150"></a>
<span class="sourceLineNo">151</span>    public void executeQuery(String query) throws SQLException {<a name="line.151"></a>
<span class="sourceLineNo">152</span>      executeQuery(this.connection, query);<a name="line.152"></a>
<span class="sourceLineNo">153</span>    }<a name="line.153"></a>
<span class="sourceLineNo">154</span><a name="line.154"></a>
<span class="sourceLineNo">155</span>    /**<a name="line.155"></a>
<span class="sourceLineNo">156</span>     *  ExecuteQuery will attempt execute the query passed to it against the<a name="line.156"></a>
<span class="sourceLineNo">157</span>     *  existing database connection.  If no connection exists then no action<a name="line.157"></a>
<span class="sourceLineNo">158</span>     *  is taken.<a name="line.158"></a>
<span class="sourceLineNo">159</span>     *  The results from the query are extracted and cached locally, thus<a name="line.159"></a>
<span class="sourceLineNo">160</span>     *  applying an upper limit on how many rows can be retrieved successfully.<a name="line.160"></a>
<span class="sourceLineNo">161</span>     *<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * @param  query  the query to be executed<a name="line.162"></a>
<span class="sourceLineNo">163</span>     * @param  con  the connection the query is to be executed against<a name="line.163"></a>
<span class="sourceLineNo">164</span>     *<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * @throws SQLException if there is a problem executing the query.<a name="line.165"></a>
<span class="sourceLineNo">166</span>     */<a name="line.166"></a>
<span class="sourceLineNo">167</span>    public void executeQuery(Connection con, String query) throws SQLException {<a name="line.167"></a>
<span class="sourceLineNo">168</span><a name="line.168"></a>
<span class="sourceLineNo">169</span>        Statement statement = null;<a name="line.169"></a>
<span class="sourceLineNo">170</span>        ResultSet resultSet = null;<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span>        try {<a name="line.172"></a>
<span class="sourceLineNo">173</span>            statement = con.createStatement();<a name="line.173"></a>
<span class="sourceLineNo">174</span>            resultSet = statement.executeQuery(query);<a name="line.174"></a>
<span class="sourceLineNo">175</span>            ResultSetMetaData metaData = resultSet.getMetaData();<a name="line.175"></a>
<span class="sourceLineNo">176</span><a name="line.176"></a>
<span class="sourceLineNo">177</span>            int columnCount = metaData.getColumnCount();<a name="line.177"></a>
<span class="sourceLineNo">178</span>            if (columnCount != 2) {<a name="line.178"></a>
<span class="sourceLineNo">179</span>                throw new SQLException(<a name="line.179"></a>
<span class="sourceLineNo">180</span>                    "Invalid sql generated.  PieDataSet requires 2 columns only"<a name="line.180"></a>
<span class="sourceLineNo">181</span>                );<a name="line.181"></a>
<span class="sourceLineNo">182</span>            }<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>            int columnType = metaData.getColumnType(2);<a name="line.184"></a>
<span class="sourceLineNo">185</span>            double value;<a name="line.185"></a>
<span class="sourceLineNo">186</span>            while (resultSet.next()) {<a name="line.186"></a>
<span class="sourceLineNo">187</span>                Comparable key = resultSet.getString(1);<a name="line.187"></a>
<span class="sourceLineNo">188</span>                switch (columnType) {<a name="line.188"></a>
<span class="sourceLineNo">189</span>                    case Types.NUMERIC:<a name="line.189"></a>
<span class="sourceLineNo">190</span>                    case Types.REAL:<a name="line.190"></a>
<span class="sourceLineNo">191</span>                    case Types.INTEGER:<a name="line.191"></a>
<span class="sourceLineNo">192</span>                    case Types.DOUBLE:<a name="line.192"></a>
<span class="sourceLineNo">193</span>                    case Types.FLOAT:<a name="line.193"></a>
<span class="sourceLineNo">194</span>                    case Types.DECIMAL:<a name="line.194"></a>
<span class="sourceLineNo">195</span>                    case Types.BIGINT:<a name="line.195"></a>
<span class="sourceLineNo">196</span>                        value = resultSet.getDouble(2);<a name="line.196"></a>
<span class="sourceLineNo">197</span>                        setValue(key, value);<a name="line.197"></a>
<span class="sourceLineNo">198</span>                        break;<a name="line.198"></a>
<span class="sourceLineNo">199</span><a name="line.199"></a>
<span class="sourceLineNo">200</span>                    case Types.DATE:<a name="line.200"></a>
<span class="sourceLineNo">201</span>                    case Types.TIME:<a name="line.201"></a>
<span class="sourceLineNo">202</span>                    case Types.TIMESTAMP:<a name="line.202"></a>
<span class="sourceLineNo">203</span>                        Timestamp date = resultSet.getTimestamp(2);<a name="line.203"></a>
<span class="sourceLineNo">204</span>                        value = date.getTime();<a name="line.204"></a>
<span class="sourceLineNo">205</span>                        setValue(key, value);<a name="line.205"></a>
<span class="sourceLineNo">206</span>                        break;<a name="line.206"></a>
<span class="sourceLineNo">207</span><a name="line.207"></a>
<span class="sourceLineNo">208</span>                    default:<a name="line.208"></a>
<span class="sourceLineNo">209</span>                        System.err.println(<a name="line.209"></a>
<span class="sourceLineNo">210</span>                                "JDBCPieDataset - unknown data type");<a name="line.210"></a>
<span class="sourceLineNo">211</span>                        break;<a name="line.211"></a>
<span class="sourceLineNo">212</span>                }<a name="line.212"></a>
<span class="sourceLineNo">213</span>            }<a name="line.213"></a>
<span class="sourceLineNo">214</span><a name="line.214"></a>
<span class="sourceLineNo">215</span>            fireDatasetChanged();<a name="line.215"></a>
<span class="sourceLineNo">216</span><a name="line.216"></a>
<span class="sourceLineNo">217</span>        }<a name="line.217"></a>
<span class="sourceLineNo">218</span>        finally {<a name="line.218"></a>
<span class="sourceLineNo">219</span>            if (resultSet != null) {<a name="line.219"></a>
<span class="sourceLineNo">220</span>                try {<a name="line.220"></a>
<span class="sourceLineNo">221</span>                    resultSet.close();<a name="line.221"></a>
<span class="sourceLineNo">222</span>                }<a name="line.222"></a>
<span class="sourceLineNo">223</span>                catch (Exception e) {<a name="line.223"></a>
<span class="sourceLineNo">224</span>                    System.err.println("JDBCPieDataset: swallowing exception.");<a name="line.224"></a>
<span class="sourceLineNo">225</span>                }<a name="line.225"></a>
<span class="sourceLineNo">226</span>            }<a name="line.226"></a>
<span class="sourceLineNo">227</span>            if (statement != null) {<a name="line.227"></a>
<span class="sourceLineNo">228</span>                try {<a name="line.228"></a>
<span class="sourceLineNo">229</span>                    statement.close();<a name="line.229"></a>
<span class="sourceLineNo">230</span>                }<a name="line.230"></a>
<span class="sourceLineNo">231</span>                catch (Exception e) {<a name="line.231"></a>
<span class="sourceLineNo">232</span>                    System.err.println("JDBCPieDataset: swallowing exception.");<a name="line.232"></a>
<span class="sourceLineNo">233</span>                }<a name="line.233"></a>
<span class="sourceLineNo">234</span>            }<a name="line.234"></a>
<span class="sourceLineNo">235</span>        }<a name="line.235"></a>
<span class="sourceLineNo">236</span>    }<a name="line.236"></a>
<span class="sourceLineNo">237</span><a name="line.237"></a>
<span class="sourceLineNo">238</span><a name="line.238"></a>
<span class="sourceLineNo">239</span>    /**<a name="line.239"></a>
<span class="sourceLineNo">240</span>     * Close the database connection<a name="line.240"></a>
<span class="sourceLineNo">241</span>     */<a name="line.241"></a>
<span class="sourceLineNo">242</span>    public void close() {<a name="line.242"></a>
<span class="sourceLineNo">243</span>        try {<a name="line.243"></a>
<span class="sourceLineNo">244</span>            this.connection.close();<a name="line.244"></a>
<span class="sourceLineNo">245</span>        }<a name="line.245"></a>
<span class="sourceLineNo">246</span>        catch (Exception e) {<a name="line.246"></a>
<span class="sourceLineNo">247</span>            System.err.println("JdbcXYDataset: swallowing exception.");<a name="line.247"></a>
<span class="sourceLineNo">248</span>        }<a name="line.248"></a>
<span class="sourceLineNo">249</span>    }<a name="line.249"></a>
<span class="sourceLineNo">250</span>}<a name="line.250"></a>




























































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